Drainage Report

5.04 0.00 0.00 51.00 8.66 5.04 0.00 0.00 52.50 8.66 5.04 0.00 0.00 54.00 8.66 5.04 0.00 0.00 55.50 8.66 5.04 0.00 0.00 57.00 8.66 5.04 0.00 0.00 58.50 8.66 5.04 0.00 0.00 60.00 8.66 5.04 0.00 0.00 61.50 8.66 5.04 0.00 0.00 63.00 8.66 5.04 0.00 0.00 64.50 8.66 5.04 0.00 0.00 66.00 8.66 5.04 0.00 0.00 67.50 8.66 5.04 0.00 0.00 69.00 8.66 5.04 0.00 0.00 70.50 8.66 5.04 0.00 0.00 72.00 8.66 5.04 0.00 0.00

Basin 5 witout exfiltration Proposed basin 5 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 41 Summary for Pond 24P: Infiltration basin 5 Inflow Area = 2.275 ac, Inflow Depth = 7.34" for 100-Year event Inflow = 14.33 cfs @ 12.18 hrs, Volume= 1.392 af Outflow = 2.86 cfs @ 12.69 hrs, Volume= 0.851 af, Atten= 80%, Lag= 30.3 min Primary = 2.86 cfs @ 12.69 hrs, Volume= 0.851 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.03 hrs Peak Elev= 573.29' @ 12.69 hrs Surf.Area= 12,410 sf Storage= 34,562 cf Plug-Flow detention time= 311.3 min calculated for 0.851 af (61% of inflow) Center-of-Mass det. time= 189.8 min ( 958.1 - 768.3 ) Volume Invert Avail.Storage Storage Description #1 570.50' 43,435 cf Custom Stage Data (Conic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 570.50 12,410 0 0 12,410 574.00 12,410 43,435 43,435 13,792 Device Routing Invert Outlet Devices #1 Primary 572.40' 18.0" W x 6.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.86 cfs @ 12.69 hrs HW=573.29' (Free Discharge) 1=Orifice/Grate (Orifice Controls 2.86 cfs @ 3.81 fps)

Basin 5 witout exfiltration Proposed basin 5 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 42 Pond 24P: Infiltration basin 5 Hydrograph Inflow 16 Primary 14.33 cfs 15 14 Inflow Area=2.275 ac 13 Peak Elev=573.29' 12 11 Storage=34,562 cf 10 Flow (cfs) 9 8 7 6 5 4 2.86 cfs 3 2 1 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)

Basin 5 witout exfiltration Proposed basin 5 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 43 Hydrograph for Pond 24P: Infiltration basin 5 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 570.50 0.00 1.50 0.08 151 570.51 0.00 3.00 0.14 774 570.56 0.00 4.50 0.18 1,641 570.63 0.00 6.00 0.21 2,676 570.72 0.00 7.50 0.31 4,051 570.83 0.00 9.00 0.43 6,055 570.99 0.00 10.50 0.82 9,360 571.25 0.00 12.00 6.47 20,094 572.12 0.00 13.50 1.27 32,240 573.10 2.38 15.00 0.65 28,106 572.76 1.06 16.50 0.48 26,754 572.66 0.62 18.00 0.35 26,136 572.61 0.45 19.50 0.31 25,752 572.58 0.35 21.00 0.28 25,555 572.56 0.31 22.50 0.24 25,398 572.55 0.27 24.00 0.21 25,252 572.53 0.24 25.50 0.00 24,501 572.47 0.10 27.00 0.00 24,131 572.44 0.05 28.50 0.00 23,940 572.43 0.03 30.00 0.00 23,836 572.42 0.02 31.50 0.00 23,764 572.41 0.01 33.00 0.00 23,711 572.41 0.01 34.50 0.00 23,674 572.41 0.01 36.00 0.00 23,647 572.41 0.00 37.50 0.00 23,628 572.40 0.00 39.00 0.00 23,614 572.40 0.00 40.50 0.00 23,604 572.40 0.00 42.00 0.00 23,597 572.40 0.00 43.50 0.00 23,592 572.40 0.00 45.00 0.00 23,588 572.40 0.00 46.50 0.00 23,586 572.40 0.00 48.00 0.00

43.50 0.00 23,592 572.40 0.00 45.00 0.00 23,588 572.40 0.00 46.50 0.00 23,586 572.40 0.00 48.00 0.00 23,584 572.40 0.00 49.50 0.00 23,582 572.40 0.00 51.00 0.00 23,581 572.40 0.00 52.50 0.00 23,581 572.40 0.00 54.00 0.00 23,580 572.40 0.00 55.50 0.00 23,580 572.40 0.00 57.00 0.00 23,580 572.40 0.00 58.50 0.00 23,579 572.40 0.00 60.00 0.00 23,579 572.40 0.00 61.50 0.00 23,579 572.40 0.00 63.00 0.00 23,579 572.40 0.00 64.50 0.00 23,579 572.40 0.00 66.00 0.00 23,579 572.40 0.00 67.50 0.00 23,579 572.40 0.00 69.00 0.00 23,579 572.40 0.00 70.50 0.00 23,579 572.40 0.00 72.00 0.00 23,579 572.40 0.00

Basin 5 witout exfiltration Proposed basin 5 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 44 Stage-Discharge for Pond 24P: Infiltration basin 5 Elevation Primary Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) (feet) (cfs) 570.50 0.00 571.52 0.00 572.54 0.25 573.56 3.43 570.52 0.00 571.54 0.00 572.56 0.31 573.58 3.47 570.54 0.00 571.56 0.00 572.58 0.37 573.60 3.51 570.56 0.00 571.58 0.00 572.60 0.43 573.62 3.55 570.58 0.00 571.60 0.00 572.62 0.50 573.64 3.58 570.60 0.00 571.62 0.00 572.64 0.57 573.66 3.62 570.62 0.00 571.64 0.00 572.66 0.64 573.68 3.66 570.64 0.00 571.66 0.00 572.68 0.71 573.70 3.69 570.66 0.00 571.68 0.00 572.70 0.79 573.72 3.73 570.68 0.00 571.70 0.00 572.72 0.87 573.74 3.76 570.70 0.00 571.72 0.00 572.74 0.95 573.76 3.80 570.72 0.00 571.74 0.00 572.76 1.04 573.78 3.83 570.74 0.00 571.76 0.00 572.78 1.13 573.80 3.86 570.76 0.00 571.78 0.00 572.80 1.22 573.82 3.90 570.78 0.00 571.80 0.00 572.82 1.31 573.84 3.93 570.80 0.00 571.82 0.00 572.84 1.41 573.86 3.97 570.82 0.00 571.84 0.00 572.86 1.50 573.88 4.00 570.84 0.00 571.86 0.00 572.88 1.60 573.90 4.03 570.86 0.00 571.88 0.00 572.90 1.70

1.50 573.88 4.00 570.84 0.00 571.86 0.00 572.88 1.60 573.90 4.03 570.86 0.00 571.88 0.00 572.90 1.70 573.92 4.06 570.88 0.00 571.90 0.00 572.92 1.79 573.94 4.10 570.90 0.00 571.92 0.00 572.94 1.87 573.96 4.13 570.92 0.00 571.94 0.00 572.96 1.95 573.98 4.16 570.94 0.00 571.96 0.00 572.98 2.02 574.00 4.19 570.96 0.00 571.98 0.00 573.00 2.09 570.98 0.00 572.00 0.00 573.02 2.15 571.00 0.00 572.02 0.00 573.04 2.21 571.02 0.00 572.04 0.00 573.06 2.27 571.04 0.00 572.06 0.00 573.08 2.33 571.06 0.00 572.08 0.00 573.10 2.39 571.08 0.00 572.10 0.00 573.12 2.44 571.10 0.00 572.12 0.00 573.14 2.50 571.12 0.00 572.14 0.00 573.16 2.55 571.14 0.00 572.16 0.00 573.18 2.60 571.16 0.00 572.18 0.00 573.20 2.65 571.18 0.00 572.20 0.00 573.22 2.70 571.20 0.00 572.22 0.00 573.24 2.75 571.22 0.00 572.24 0.00 573.26 2.80 571.24 0.00 572.26 0.00 573.28 2.85 571.26 0.00 572.28 0.00 573.30 2.89 571.28 0.00 572.30 0.00 573.32 2.94 571.30 0.00 572.32 0.00 573.34 2.98 571.32 0.00 572.34 0.00 573.36 3.03 571.34 0.00 572.36 0.00 573.38 3.07 571.36 0.00 572.38 0.00 573.40 3.11 571.38 0.00 572.40 0.00 573.42 3.15 571.40 0.00 572.42 0.01 573.44 3.20 571.42 0.00 572.44 0.04 573.46 3.24 571.44 0.00 572.46 0.07 573.48 3.28 571.46 0.00 572.48 0.11 573.50

571.42 0.00 572.44 0.04 573.46 3.24 571.44 0.00 572.46 0.07 573.48 3.28 571.46 0.00 572.48 0.11 573.50 3.32 571.48 0.00 572.50 0.15 573.52 3.36 571.50 0.00 572.52 0.20 573.54 3.40

Basin 5 witout exfiltration Proposed basin 5 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 45 Stage-Area-Storage for Pond 24P: Infiltration basin 5 Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 570.50 12,410 0 573.05 12,410 31,645 570.55 12,410 620 573.10 12,410 32,266 570.60 12,410 1,241 573.15 12,410 32,886 570.65 12,410 1,861 573.20 12,410 33,507 570.70 12,410 2,482 573.25 12,410 34,128 570.75 12,410 3,103 573.30 12,410 34,748 570.80 12,410 3,723 573.35 12,410 35,369 570.85 12,410 4,344 573.40 12,410 35,989 570.90 12,410 4,964 573.45 12,410 36,610 570.95 12,410 5,585 573.50 12,410 37,230 571.00 12,410 6,205 573.55 12,410 37,850 571.05 12,410 6,825 573.60 12,410 38,471 571.10 12,410 7,446 573.65 12,410 39,091 571.15 12,410 8,066 573.70 12,410 39,712 571.20 12,410 8,687 573.75 12,410 40,333 571.25 12,410 9,308 573.80 12,410 40,953 571.30 12,410 9,928 573.85 12,410 41,574 571.35 12,410 10,549 573.90 12,410 42,194 571.40 12,410 11,169 573.95 12,410 42,815 571.45 12,410 11,790 574.00 12,410 43,435 571.50 12,410 12,410 571.55 12,410 13,030 571.60 12,410 13,651 571.65 12,410 14,271 571.70 12,410

43,435 571.50 12,410 12,410 571.55 12,410 13,030 571.60 12,410 13,651 571.65 12,410 14,271 571.70 12,410 14,892 571.75 12,410 15,513 571.80 12,410 16,133 571.85 12,410 16,754 571.90 12,410 17,374 571.95 12,410 17,995 572.00 12,410 18,615 572.05 12,410 19,235 572.10 12,410 19,856 572.15 12,410 20,476 572.20 12,410 21,097 572.25 12,410 21,718 572.30 12,410 22,338 572.35 12,410 22,959 572.40 12,410 23,579 572.45 12,410 24,200 572.50 12,410 24,820 572.55 12,410 25,440 572.60 12,410 26,061 572.65 12,410 26,681 572.70 12,410 27,302 572.75 12,410 27,923 572.80 12,410 28,543 572.85 12,410 29,164 572.90 12,410 29,784 572.95 12,410 30,405 573.00 12,410 31,025